Aniline → methyl 3-anilino-2-(3,4-dimethylbenzoyl)prop-2-enoate
Reaction equation
[CH3:1][O:2][C:3](=[O:18])[C:4]([C:8](=[O:17])[C:9]1[CH:14]=[CH:13][C:12]([CH3:15])=[C:11]([CH3:16])[CH:10]=1)=[CH:5]OC.[NH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>>[CH3:1][O:2][C:3](=[O:18])[C:4]([C:8](=[O:17])[C:9]1[CH:14]=[CH:13][C:12]([CH3:15])=[C:11]([CH3:16])[CH:10]=1)=[CH:5][NH:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1Participants
3
Procedure
Crude 2-(3,4-dimethyl-benzoyl)-3-methoxy-acrylic acid methyl ester 1a(13.7 g, 55.1 mmol) and of aniline (5.12 g, 55.1 mmol) were heated neat at 100° C. for 30 minutes, then cooled down to room temperature and recrystallized from dichloromethane/hexane to yield 7.94 g of 2-(3,4-Dimethyl-benzoyl)-3-phenylamino-acrylic acid methyl ester 2a as a yellow crystalline solid: LC-MSD, m/z for C19H19NO3 [M+H]+=310.4; HPLC retention time: 2.8 min.
Workup
- customrecrystallized from dichloromethane/hexane